Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869)
Edison, Thomas A. (Thomas Alva), 1847-1931, Peters, N. (Norris), lithographer, Hammer, William Joseph, 1858-1934, former owner. DSI, Edison, Thomas A. (Thomas Alva), 1847-1931, inscriber. DSI, United States. Patent Office · Washington, D.C. : U.S. Patent Office · leaf 563
forth. 4. In an instrument for making a record ofsound-vibrations, the combination, with thediaphragm and point, of a cylinder having ahelical groove and means for revolving thecylinder and communicating an end movementcorresponding to the inclination of the helicalgroove, substantially as set… … i-PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. 0 C. 2 Sheets-Sheet 2. T. A. EDISON.Acoustic Telegraph. No. 200,993. Patented March 5, 1878. —m—i
Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors
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